How many GJ is 80 t TNT?
80 t TNT = 334.72 GJ
It is 334.72 GJ, so saying 335 GJ is fine — rounding is within 0.5%.
And how many t TNT is 80 GJ?
80 GJ = 19.12 t TNT
Formula: GJ = t TNT × 4.184
t TNT to GJ around this value
35 t TNT146.44GJ
40 t TNT167.36GJ
45 t TNT188.28GJ
50 t TNT209.2GJ
55 t TNT230.12GJ
60 t TNT251.04GJ
65 t TNT271.96GJ
70 t TNT292.88GJ
75 t TNT313.8GJ
80 t TNT334.72GJ
85 t TNT355.64GJ
90 t TNT376.56GJ
95 t TNT397.48GJ
100 t TNT418.4GJ
105 t TNT439.32GJ
110 t TNT460.24GJ
115 t TNT481.16GJ
120 t TNT502.08GJ
125 t TNT523GJ
130 t TNT543.92GJ